Invalid Handle Object with Subplot
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Hi, I would appreciate any help on this matter, thank you for reading :)
I am attempting to do something like the following:
x1 = [1 2 3 4];
y1 = [2 4 6 8];
y2 = [4 8 12 16];
figure; hold on;
h1 = subplot(1,2,1);
hold on;
plot(x1,y1)
h2 = subplot(1,2,2);
hold on;
plot(x1,y2);
set(h1,'title','test1');
set(h2,'title','test2');
However, I get the error:
??? Error using ==> set Value must be a handle
I have also attempted to set both the figure and subplot properties to include 'NextPlot','add' but this did not help.
Thanks for all suggestions!
0 Comments
Accepted Answer
Daniel Shub
on 28 Oct 2011
The problem is that the property title requires a handle to a text object and not a string. The help http://www.mathworks.com/help/releases/R2011a/techdoc/ref/axes_props.html deals with this. You can create a text object in the appropriate axis with:
axes(h1);
set(h1,'title',text('string', 'test1'));
axes(h2);
set(h2,'title',text('string', 'test2'));
You might just want to use:
title(h1, 'test1');
3 Comments
Daniel Shub
on 28 Oct 2011
That is because you left out the axes(h1) part. The text command puts the text into the current axes (in this case h2) and you want it in h1.
More Answers (1)
the cyclist
on 28 Oct 2011
Are you just trying to set titles of each subplot?
x1 = [1 2 3 4];
y1 = [2 4 6 8];
y2 = [4 8 12 16];
figure; hold on;
h1 = subplot(1,2,1);
title('test1')
hold on;
plot(x1,y1)
h2 = subplot(1,2,2);
title('test2')
hold on;
plot(x1,y2);
Part of the problem of the way you were trying to do it was that h1 and h2 are the handles for the lines plotted, not for the plotting axes.
2 Comments
Daniel Shub
on 28 Oct 2011
The handles h1 and h2 are handles to the axes since they are returned by subplot. The problem is that the title property does not want a string, but rather a handle.
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